import React, { Component } from 'react'
//引入store
import store from '../../redux/store'
//引入action creator
import { createIncrementAction, createDecrementAction, createIncrementAsyncAction } from '../../redux/count_action'

export default class Count extends Component {

  state = {countxxx:0}

  /*
  componentDidMount(){
    store.subscribe(()=>{
      this.setState({})
    })
  }
  */

  //加法
  increment = ()=>{
    const {value} = this.selectNumber
    store.dispatch(createIncrementAction(value*1))
  }
  //减法
  decrement = ()=>{
    const {value} = this.selectNumber
    store.dispatch(createDecrementAction(value*1))
  }
  //奇数再加
  incrementIfOdd = ()=>{
    const {value} = this.selectNumber
    const count = store.getState()
    if(count%2!==0) {
      store.dispatch(createIncrementAction(value*1))
    }
  }
  //异步加
  incrementAsyn = ()=>{
    const {value} = this.selectNumber
//    setTimeout(() => {
      store.dispatch(createIncrementAsyncAction(value*1,500))
//    }, 500);    
  }
  render() {
    return (
      <div>
        <h1>当前求和为：{store.getState()}</h1>
        <select ref={c=>this.selectNumber=c}>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
        </select>&nbsp;
        <button onClick={this.increment}>+</button>&nbsp;
        <button onClick={this.decrement}>-</button>&nbsp;
        <button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>&nbsp;
        <button onClick={this.incrementAsyn}>异步加</button>&nbsp;
      </div>
    )
  }
}
